body {
  min-width: 8.5333rem;
  max-width: 20rem;
  margin: 0 auto;
}
@media screen and (min-width: 750px) {
  html {
    font-size: 1rem;
  }
}
a {
  text-decoration: none;
  color: #707070;
}
.header {
  height: 2.24rem;
  border-bottom: 1px solid #ccc;
  text-align: center;
  line-height: 2.24rem;
  font-size: 1.6rem;
}
.nav {
  display: flex;
  flex-wrap: wrap;
}
.nav a {
  margin-top: 0.2667rem;
  display: flex;
  flex: 33.33333%;
  flex-direction: column;
  align-items: center;
}
.nav a img {
  height: 3.7067rem;
  width: 3.7067rem;
}
.nav a span {
  font-size: 0.6667rem;
}
